#include <iostream>
using namespace std;

// Definition for singly-linked list.
struct ListNode {
    int val;
    ListNode *next;
    ListNode(int x) : val(x), next(NULL) {}
};


class Solution {
public:
    ListNode *getIntersectionNode(ListNode *headA, ListNode *headB) {
        ListNode* a = headA;
        ListNode* b = headB;

        while(a != b)
        {
            a = a != nullptr ? a->next : headB;
            b = b != nullptr ? b->next : headA;
        }
        return a;
    }
};

int main()
{
    return 0;
}